The mass spectra of nitroarenes were studied under EI
conditions. The spectra consist of the signals
from loss of 30 and 46 mass units along with molecular ions and doubly
charged ions of [M − 47]+.
The ratios between [M − 30]+ and ([M −
46]+ + [M − 47]+) are well
correlated with the torsion
angles of O−N−C−C obtained from calculation using the PM3 method
except that the nitro group
is between two peri positions.
3-Aryl-1,1-dichloro-3-methoxypropenes, methyl 3-aryl-3-methoxypropionates and 3-acetamido-3-aryl-1,1-dichloropropenes are obtained along with N-acetyl-4-aryllactams via anodic oxidation of 1-aryl-2,2-dichlorocyclopropanes in methanol and acetonitrile solutions, respectively.
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